If you are looking for bird friendly trees and shrubs a database has been created that can help. The Audubon Native Plants Database allows you to enter a zip code and get a list of bird friendly native plants. You can filter based on plant type and what type of bird the plant attracts. The database also shows what kind of birds favor particular plants.
For more information contact Ellen Clark (EllenA.Clark@Wisconsin.gov), Urban Forestry Communication Specialist, at 608-267-2774.